Hello, I'd like to ask about the thermos cup with the patent number ZL 00220384.7 for celebrating the 60th anniversary of the founding of the People's Republic of China. I wonder how much it costs. If

Hello, I'd like to ask about the thermos cup with the patent number ZL 00220384.7 for celebrating the 60th anniversary of the founding of the People's Republic of China. I wonder how much it costs. If you know, please let me know. It seems that RT Mart sold for more than 30 yuan. There is no anniversary written. The cover of the filter screen is silver, and the patent number is on the silver cover. I thought it was high-tech. Who knows, it's just an extra filter cover that can be unscrewed. It looks cheap. Cup or buy glass or porcelain, plastic preheating water will produce toxic substances and carcinogens and so on.